Ngọngọ ike Rockwell na Rockwell na-adịghị elu
Njikọta siri ike nke Brinell
Njikọta Ike Ndị Ọzọ
Njikọ siri ike nke Vickers na Micro Vickers
Indeter
Anya na Ebumnuche
Ngwaọrụ mmetụta Leeb
Ihe eji eme ihe na metallographic
